Security professionals, including Microsoft's own product release virus scanning chief, called Apple's efforts to deflect blame onto Microsoft misleading and said the batch of factory-infected iPods reveals a troubling lack of thoroughness in the company's manufacturing process.

On Monday, Apple released a statement on its Web site noting that a "small number of video iPods shipped with a Windows virus," which the company identified as RavMonE.exe. The number of affected iPods is small -- less than 1 percent of all Video iPods available for purchase after Sept. 12, 2006, the company said in its statement, adding "as you might imagine, we are upset at Windows for not being more hardy against such viruses, and even more upset with ourselves for not catching it."

That statement drew criticism from security experts, including Jonathan Poon, the man in charge of scanning Microsoft products for viruses before they ship.

"It's not a matter of which platform the virus originated [on]. The fact that it's found on the portable player means that there's an issue with how the quality checks, specifically the content check, was done," Poon wrote in a blog entry.